Mean and malicious Rihanna, 25, derisively laughed during a performance by fellow singer Ariana Grande at the iHeartRadio Music Awards. Pop culture websites noted Rihanna's derisive laughter during Grande's performance. I don't know why she's laughing. At least Grande can sing, which can't be said for her.
Rihanna's reaction to Grande is most likely due to the 20-year-old singer having closely worked with Chris Brown, the love of Rihanna's life, who broke up with her and went back to model Karrueche Tran. Rihanna is still in love with Brown, who is currently in jail and video footage of the project he did with Grande, getting very close to her, made Rihanna jealous.